Some techniques and apparatuses described herein provide synchronization signal numerology, coverage extension/repetition schemes, and synchronization signal burst set periodicities for 5G IoT user equipment (UEs). For example, some techniques and apparatuses described herein provide a sequence of slots and/or particular symbols within a slot for transmission of a synchronization signal and/or a broadcast channel. Furthermore, some techniques and apparatuses described herein define minimum bandwidths of IoT UEs in relation to non-IoT UEs, and define synchronization signal burst set periodicities that may be different for IoT UEs than for non-IoT UEs.
Legal claims defining the scope of protection, as filed with the USPTO.
1. A method of wireless communication performed by an Internet of Things (IoT) user equipment (UE), comprising: receiving a synchronization signal (SS) block, wherein the SS block includes at least three slots, wherein a primary synchronization signal, a secondary synchronization signal, and a broadcast channel are each transmitted in a corresponding slot of the at least three slots, wherein at least one of a bandwidth or a subcarrier spacing of the SS block is based at least in part on a frequency band of the SS block, and wherein a number of SS blocks received within a time window corresponds to the subcarrier spacing of the SS block; and performing synchronization using the SS block.
2. The method of claim 1 , wherein the at least three slots are consecutive slots.
3. The method of claim 1 , wherein the subcarrier spacing of the SS block is different than a subcarrier spacing of a non-IoT SS block in the frequency band.
4. The method of claim 1 , wherein a first transmission of a broadcast channel and a retransmission of the broadcast channel are transmitted in the at least three slots.
5. The method of claim 1 , wherein a slot of the at least three slots includes fourteen symbols, and wherein less than twelve symbols of the slot are used for the SS block.
6. The method of claim 1 , wherein at least a portion of a synchronization signal sequence associated with a radio access technology different than one used by the IoT UE is used for a synchronization signal of the SS block.
7. The method of claim 1 , wherein a set of symbols of a slot, of the at least three slots, are allocated to one of a synchronization signal or broadcast channel of the SS block and wherein the set of symbols do not overlap with a control symbol, a guard period symbol, or a data symbol of a data transmission.
8. The method of claim 1 , wherein two consecutive slots, of the at least three slots, are allocated to one of the primary synchronization signal, the secondary synchronization signal, or the broadcast channel of the SS block, and wherein the primary synchronization signal, the secondary synchronization signal, or the broadcast channel does not overlap with a control symbol, a guard period symbol, or a data symbol of a data transmission for a non-IoT UE.
9. The method of claim 1 , wherein the SS block is one of multiple SS blocks, and wherein each SS block, of the multiple SS blocks, is associated with a different beam.
10. The method of claim 9 , wherein the multiple SS blocks are received within flail the time window.
11. The method of claim 1 , wherein a synchronization signal burst set periodicity of the IoT UE is shorter during a first mode than during a second mode.
12. The method of claim 1 , wherein a synchronization signal burst set periodicity of the IoT UE is different than a synchronization signal burst set periodicity for a non-IoT UE.
13. A method of wireless communication performed by a base station, comprising: transmitting a synchronization signal (SS) block, wherein the SS block includes at least three slots, wherein a primary synchronization signal, a secondary synchronization signal, and a broadcast channel are each transmitted in a corresponding slot of the at least three slots, wherein at least one of a bandwidth or a subcarrier spacing of the SS block is based at least in part on a frequency band of the SS block, and wherein a number of SS blocks received within a time window corresponds to the subcarrier spacing of the SS block; and performing synchronization using the SS block.
14. The method of claim 13 , wherein the at least three slots are consecutive slots.
15. The method of claim 13 , wherein the SS block is an Internet of Things (IoT) SS block, and wherein the subcarrier spacing of the IoT SS block is different than a subcarrier spacing for a non-IoT SS block in the frequency band.
16. The method of claim 13 , wherein a first transmission of a broadcast channel and a retransmission of the broadcast channel are transmitted in the at least three slots.
17. The method of claim 13 , wherein a slot of the at least three slots includes fourteen symbols, and wherein less than twelve symbols of the slot are used for the SS block.
18. The method of claim 13 , wherein at least a portion of a synchronization signal sequence associated with a radio access technology, different than a radio access technology of a user equipment associated with the SS block, is used for a synchronization signal of the SS block.
19. The method of claim 13 , wherein a set of symbols of a slot, of the at least three slots, are allocated to one of a synchronization signal or broadcast channel of the SS block and wherein the set of symbols do not overlap with a control symbol, a guard period symbol, or a data symbol of a data transmission.
20. The method of claim 13 , wherein the SS block is an Internet of Things (IoT) SS block, wherein two consecutive slots, of the at least three slots, are allocated to one of the primary synchronization signal, the secondary synchronization signal, or the broadcast channel of the SS block, and wherein the primary synchronization signal, the secondary synchronization signal, or the broadcast channel does not overlap with a control symbol, a guard period symbol, or a data symbol of a data transmission for a non-IoT user equipment.
21. The method of claim 13 , wherein the SS block is one of multiple SS blocks, and wherein each SS block, of the multiple SS blocks, is associated with a different beam.
22. The method of claim 21 , wherein the multiple SS blocks are received within flail the time window.
23. The method of claim 13 , wherein a synchronization signal burst set periodicity of an Internet of Things (IoT) UE is shorter during a first mode than during a second mode.
24. The method of claim 13 , wherein the SS block is an Internet of Things (IoT) SS block, and wherein a synchronization signal burst set periodicity of the SS block is different than a synchronization signal burst set periodicity of a non-IoT SS block.
25. An Internet of Things (IoT) user equipment (UE) for wireless communication, comprising: a memory; and at least one processor coupled to the memory, the memory and the at least one processor configured to: receive a synchronization signal (SS) block, wherein the SS block includes at least three slots, wherein a primary synchronization signal, a secondary synchronization signal, and a broadcast channel are each transmitted in a corresponding slot of the at least three slots, wherein at least one of a bandwidth or a subcarrier spacing of the SS block is based at least in part on a frequency band of the SS block, and wherein a number of SS blocks received within a time window corresponds to the subcarrier spacing of the SS block; and perform synchronization using the SS block.
26. The IoT UE of claim 25 , wherein the at least three slots are consecutive slots.
27. The IoT UE of claim 25 , wherein the SS block is one of multiple SS blocks, and wherein each SS block is associated with a different beam.
28. A base station for wireless communication, comprising: a memory; and one or more processors operatively coupled to the memory, the memory and the one or more processors configured to: transmit a synchronization signal (SS) block, wherein the SS block includes at least three slots, wherein a primary synchronization signal, a secondary synchronization signal, and a broadcast channel are each transmitted in a corresponding slot of the at least three slots, wherein at least one of a bandwidth or a subcarrier spacing of the SS block is based at least in part on a frequency band of the SS block, and wherein a number of SS blocks received within a time window corresponds to the subcarrier spacing of the SS block; and perform synchronization using the SS block.
29. The base station of claim 28 , wherein the three slots are consecutive slots.
30. The base station of claim 28 , wherein the SS block is one of multiple SS blocks, and wherein each SS block, of the multiple SS blocks, is associated with a different beam.
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June 27, 2018
July 28, 2020
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